Dynamic pressure was applied on emulsion explosive by using an underwater explosion measuring apparatus, and the crystallization quantity was measured by dissolution method after emulsion explosive was pressed; the in...Dynamic pressure was applied on emulsion explosive by using an underwater explosion measuring apparatus, and the crystallization quantity was measured by dissolution method after emulsion explosive was pressed; the influence of emulsi- fier content and type was analyzed. The experimental results show that emulsifier content and type have an important effect on crystallization quantity of emulsion explosive. The crystallization quantity will reduce with Span-g0 content from 2% to 4%, so the demulsification and crystallization will decrease if the emulsifier content improves appropriately and the dynamic pressure resistance will increase. For emulsion explosive emulsified by T-152 and Span-g0, the crystallization quantity with T-152 is less than that of Span-g0 under the same dynamic pressure. This shows that the emulsifying effect ofT-152 is better than Soan-80.展开更多
Outbursts of methane and rocks are, similarly to rock bursts, the biggest hazards in deep mines and are equally difficult to predict. The violent process of the outburst itself, along with the scale and range of hazar...Outbursts of methane and rocks are, similarly to rock bursts, the biggest hazards in deep mines and are equally difficult to predict. The violent process of the outburst itself, along with the scale and range of hazards following the rapid discharge of gas and rocks, requires solutions which would enable quick and unambiguous detection of the hazard, immediate power supply cut-off and evacuation of personnel from potentially hazardous areas. For this purpose, an integrated outburst detector was developed. Assumed functions of the sensor which was equipped with three measuring and detection elements： a chamber for constant measurement of methane concentration, pressure sensor and microphone. Tests of the sensor model were carried out to estimate the parameters which characterize the dynamic properties of the sensor. Given the impossibility of carrying out the full scale experimental outburst, the sensor was tested during the methane and coal dust explosions in the testing gallery at KD Barbara. The obtained results proved that the applied solutions have been appropriate.展开更多
As we enter the new millennium, population explosion, increasing worldwide energy demands and rapid global increase in ionizing radiation are all now threatening our fragile environment like no other time in known his...As we enter the new millennium, population explosion, increasing worldwide energy demands and rapid global increase in ionizing radiation are all now threatening our fragile environment like no other time in known history. There is an urgent need for research and education to focus on the complex and direct link between ionizing radiation and its irreversible impact on the environment. Hence, nuclear energy and ionizing radiation issues can no longer be viewed in isolation. Historical facts and official reports prove that a code of ethics did not previously exist in nuclear industry： the risks of ionizing radiation are too great and unpredictable. Elimination of existing man-made ionizing radiation sources in this century is untenable and unsustainable. The intent of this paper is to review and demonstrate that ＇Atoms for Peace＇ is a false and unethical enterprise, and offers insights into the social and ethical aspects of ionizing radiation as a result of nuclear power development. The unethical nature of nuclear weapons, along with risk perception and ethical dilemmas of atom for peace, nuclear weapon tests, the International Atomic Energy Agency, the Nuclear Non-Proliferation Treaty, the International Court of Justice＇s opinion and the World Economic Forum-Global Risk Landscape will be discussed.展开更多
基金Supported by the National Natural Science Foundation of China （50574004）
文摘Dynamic pressure was applied on emulsion explosive by using an underwater explosion measuring apparatus, and the crystallization quantity was measured by dissolution method after emulsion explosive was pressed; the influence of emulsi- fier content and type was analyzed. The experimental results show that emulsifier content and type have an important effect on crystallization quantity of emulsion explosive. The crystallization quantity will reduce with Span-g0 content from 2% to 4%, so the demulsification and crystallization will decrease if the emulsifier content improves appropriately and the dynamic pressure resistance will increase. For emulsion explosive emulsified by T-152 and Span-g0, the crystallization quantity with T-152 is less than that of Span-g0 under the same dynamic pressure. This shows that the emulsifying effect ofT-152 is better than Soan-80.
文摘Outbursts of methane and rocks are, similarly to rock bursts, the biggest hazards in deep mines and are equally difficult to predict. The violent process of the outburst itself, along with the scale and range of hazards following the rapid discharge of gas and rocks, requires solutions which would enable quick and unambiguous detection of the hazard, immediate power supply cut-off and evacuation of personnel from potentially hazardous areas. For this purpose, an integrated outburst detector was developed. Assumed functions of the sensor which was equipped with three measuring and detection elements： a chamber for constant measurement of methane concentration, pressure sensor and microphone. Tests of the sensor model were carried out to estimate the parameters which characterize the dynamic properties of the sensor. Given the impossibility of carrying out the full scale experimental outburst, the sensor was tested during the methane and coal dust explosions in the testing gallery at KD Barbara. The obtained results proved that the applied solutions have been appropriate.
文摘As we enter the new millennium, population explosion, increasing worldwide energy demands and rapid global increase in ionizing radiation are all now threatening our fragile environment like no other time in known history. There is an urgent need for research and education to focus on the complex and direct link between ionizing radiation and its irreversible impact on the environment. Hence, nuclear energy and ionizing radiation issues can no longer be viewed in isolation. Historical facts and official reports prove that a code of ethics did not previously exist in nuclear industry： the risks of ionizing radiation are too great and unpredictable. Elimination of existing man-made ionizing radiation sources in this century is untenable and unsustainable. The intent of this paper is to review and demonstrate that ＇Atoms for Peace＇ is a false and unethical enterprise, and offers insights into the social and ethical aspects of ionizing radiation as a result of nuclear power development. The unethical nature of nuclear weapons, along with risk perception and ethical dilemmas of atom for peace, nuclear weapon tests, the International Atomic Energy Agency, the Nuclear Non-Proliferation Treaty, the International Court of Justice＇s opinion and the World Economic Forum-Global Risk Landscape will be discussed.
